Did selection for seed traits across the Cretaceous/Paleogene boundary sort plants based on ploidy?
Paleobotanists debate whether the Cretaceous/Paleogene boundary (KPB) event was selective.As the hypothesis that the KPB event selected for plants with fast-return leaf economic traits (e.g.deciduousness) has lost empirical support in recent investigations, researchers have turned to alternative hypotheses to explain an abrupt decline in primary pr